Castlevania Adventure Cheats (GameBoy)

First when you start to fight the level 1 boss, you will see two platforms on each side.
If you see the boss walking to the right, jump on the platform when he gets closer. Jump
on the next one. Jump off and then hit him. Do this a couple times to kill him.

Locate the secret room in level 1 that contains a rope. Climb the rope to the top of the
screen and through the ceiling. Collect the extra life, then find the extra life that
appears later in the level. After both are collected, intentionally die and repeat this
procedure.